Door-spring



Patented June 28, 1881;

(ModeL) J. T. BUSH.

Door Spring.

TTORNEYS.,

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UNITED STAT'ES PATENT OFFICE.

JOHN T. BUSH, OF TYRONE, PENNSYLVANIA.

DOOR-SPRING.`

SPECIFICATION forming part of Letters Patent No. 243,405, datecl June 28, 1881.

' Application filed April12,1881. (ModeL) To (all whom it may concew Be it known that I, JOHN T. BUSH, of Tyrone, in the County of Blair and State of Pennsylvania, have invented certain new and useful Improvements in Door-Springs; and I do hereby declare that the following is a full,

clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanyingdrawin gs, which form a part of this specification.

Figure 1 is a side View. Fig. 2 is a vertical sectional View. Fig. 3 is a horizontal sectional View, and Fig. 4 is a top view.

Corresponding parts in the several figures are denotedby like letters ot' reference.

This invention relatcs to an elastic doorspring, the Construction and operation of which will be hereinafter i'ully described, and particularly pointed out in the claims.

In the drawings hereto annexcd, A represents the door-frame, which is of the ordinary Construction. Upon the inside of the jamb is secured a vertical strip or heavy molding, B,having avertical groove, O, in which a thick and stoutrubberstrip,D, is secured by screws, nals, glue, or in any other suitable manner.

E is the door, the edge of which is provided with a vertical groove, F, in which the edge of the rubber strip D, projecting from nolding B, is fitted and secured, as shown, by screws or otherwise.

It will be seen that by this Construction the rubber strip D forms an elastic hinge, which relains the door automatically in a closed position. The door may be pnshed open from either side, and when released from the pressure ot' the hand will spring back to a closed position.

In heavy doors, which might have a tendency to sag and bear down upon the threshold, I prefer to use a supplemental metallic strap-liinge, as shown in Fig. 4 of the drawings. The leaves of said hinge, which are represented by letter G, are secured respectively to the top edge of the door and'to the top of moldi g B, the pivot H being adjusted directly over the centerof strip D. This hinge, while not interfering in the least with the operation of the elastic hinge, greatly adds to the stability and durability of the device. I would have it thoroughly understood, however, that the said metallic linge may or may not be used without interfering with the nature of my invention.

My improved elastic hiuge is simple in construction,inexpensive, and completely answers the purpose of the complicated spring-hinges which are now commonly used. At the sane time it forms a complete guard against the adnission of wind. dust, and moisture through the hinged side of the door. 4

Having thus described my invention, I claim and desire to secure by Letters Patent ot' the United States A 1. The combination, with a door-frame, of a vertically-grooved nolding secured to the side u 

